Improvement in sash-fasteners



UNITED STATES PATENT OFFICE. i

ORVELLAS H. GILBERT, OF DARIEN, WISCONSIN.

IMPROVEMENT IN SASH-FASTENERS.4

Specification forming part of Letters Patent No. 144,451, dated November 11, 1873 5 application filed:

October 11, 1873.

To all whom fit may concern:

Be it known that I, ORvELLAs H. GILBERT, of Darien, in the county of Walworth and State of Wisconsin, have invented a new and useful Improvement in Sash-Locks, of which the following is a specification:

The object of this invention is to furnish a safe and convenient sash-lock, and which shall be strong and durable, not liable to get out of order; and it consists in the construction `and removed, and Fig. 4 shows a portion of the window-sill with a stop-button thereon.

Similar letters of reference indicate corresponding parts. p

A represents the sash. B is the casing, and C is the lock, which is attached to the sash. The lock consists of aninner and an outer plate', which inclose the operating parts of the lock, thebolt being shot through openings in the front and back edges of the lock. D is the bolt. E is a spring, which is confined between the plates of the lock, the outer end of which enters a slot in the bolt, as seen at F. G is the Engerpiece, which is pivotedin the lock at the point H. Its long arm I extends through the edge of the lock. Its short arm J enters the recess K in the lower edge of the bolt. L is a pawl, which` is pivoted at the point m. This pawl enters a recess, N, in the upper edge of the bolt, and effectually prevents a back motion of the bolt. O is a spring, which bears with a con-v stant pressure against the pawl, the effect of which is to force the pawl into the recess N.

As seen in the drawing, the sash is locked, ther bolt being shot into the recess P of the casing.

In this position the bolt will remain until the pawl is raised out of the recess in the `.bo1t. 'Toy raise the pawl I use the key Q, which is inserted by means of the key-hole R. The key. is used simply to raise the pawl, so that the. bolt can be withdrawn by a down pressure on the long arm I of the finger-piece G. 4When the bolt is withdrawn the sashmay. be raised to the recess P', or to any other recess in the casing which will receive the bolt. Any upper recess will be so constructed that the bolt will not throw a full stroke, and consequently will not lock, as it is unnecessary to lock the sash, except when it is down, or very near down. lt may be locked so as to leave an opening to admit air but exclude burglars. S is a movable button attached to the windowsill T, which may be turned so that the sash will not close down entirely, and consequently will not. lock. The forward motion of the bolt is automatically produced by the spring E, the constant tendency of which spring is to force the bolt outward. .l

Although this lock is more especially designed for window-sashes, itis obvious that it may be used for other purposes. I do not therefore confine myself exclusively to windowsashes, but for all thepurposes to which it may be applicable. f

Having thus described my invention, I claim as new and desire to secure by Letters Patent- A lock for sashes and other purposes, having recesses F Kin the bolt, linger-piece G, pawl L, and springs E and 0, arranged to operate substantially as and for the purposes de scribed.

ORVELLAS H. GILBERT.

Witnesses CEAS. S. TArLE, JACOB HEYER. 

